Selling a pair of Grivel G12 Semi-Auto Crampons! Like new - used twice on glacier/snow only. Bought these for a mountaineering course when I was getting into the sport and did my homework - these are some of the best all-mountain 12-point crampons on the market. Still nice and sharp with minor scuffs. Retails for $199.95 - Asking $100 + shipping ($110 if you want the new BD crampon case with 'em). 

From the Grivel website (grivel.com/products/g12)

12-point crampon for all types of mountaineering, very durable.

G12 is "the king of crampons", used for climbing mountains all around the world. It has 12 points, 8 of which in the front and 4 in the back, allowing a perfect stability and performance in all snow and ice conditions. Available with Cramp-O-Matic EVO, New-Matic EVO, New-Classic EVO systems, they are adjustable and adapt to any type of boot. Equipped with the famous Grivel proactive Antibott both in the front and the rear. A crampon that makes strength and reliability of its strongest points.

• Activities: glacier walking/ classical and technical mountaineering
• Materials / construction / technologies: steel, plastic
• Certification: CE EN 893, UIAA 153
• Weight: 1.012 g/pair (Cramp-O-Matic EVO); 1.006 g/pair (New-Matic EVO); 964 g/pair (New-Classic EVO) 
• Sizes: 36-47
• Antibott: front and rear